AutoCodes – Honda – P2271 Honda

P2271 Honda Code - Secondary Heated Oxygen Sensor 2 Bank 1 Circuit Signal Stuck Rich

Quick Answer

The secondary HO2S detects the oxygen concentration in the exhaust gas downstream of the three-way catalyst (TWC). Common causes include Faulty Rear Heated Oxygen Sensor 2 Bank 1, Rear Heated Oxygen Sensor 2 Bank 1 harness is open or shorted, Rear Heated Oxygen Sensor 2 Bank 1 circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: P2271 Honda indicates Secondary Heated Oxygen Sensor 2 Bank 1 Circuit Signal Stuck Rich.
Common causes: Common causes include Faulty Rear Heated Oxygen Sensor 2 Bank 1, Rear Heated Oxygen Sensor 2 Bank 1 harness is open or shorted, Rear Heated Oxygen Sensor 2 Bank 1 circuit poor electrical connection.
Severity: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

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Code Popularity 8,652

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P2271 Honda Description

The secondary HO2S detects the oxygen concentration in the exhaust gas downstream of the three-way catalyst (TWC). The sensor output voltage characteristics are similar to the Air/Fuel ratio (A/F) sensor. The oxygen concentration is detected after the TWC during fuel feedback control using the A/F sensor, and it optimizes the fuel feedback control to maximize the effect of the TWC. If, after current is applied to the secondary HO2S heater, the secondary HO2S does not fluctuate and the output is stuck within the specified area, a malfunction is detected and a Diagnostic Trouble Code (DTC) is stored.

OBDII Code P2271 Honda - Secondary Heated Oxygen Sensor 2 Bank 1 Circuit Signal Stuck Rich - AutoCodes.com — P2271 Honda Code - Secondary Heated Oxygen Sensor 2 Bank 1 Circuit Signal Stuck Rich

What does this mean?

What are the Possible Causes of the DTC P2271 Honda?

Faulty Rear Heated Oxygen Sensor 2 Bank 1
Rear Heated Oxygen Sensor 2 Bank 1 harness is open or shorted
Rear Heated Oxygen Sensor 2 Bank 1 circuit poor electrical connection

How to Fix the DTC P2271 Honda?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2271 Honda code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.